tank wiped out gotta start over

[weewane]

Well I have a tank that crashed. I started seeing problems with my fish a few days ago and within 36hrs everything died. This was a well established tank and I don't know what caused the problem. in the end I lost a total of 9 fish. To be honest I am tired of trying to figure out what went wrong.

Anyways onto the point of this thread. What steps should I take to break down and clean this killer tank to start over. Do I clean everything with a bleach mix? scrub everything as best as I can and with what? Also what should I do about my bio wheel on my HOB should I replace it, or try to clean that as well? should I maybee replace my substrate or clean it as well. I have never had a tank crash on me before so I really don't know what steps to make.

Thanks for any help

 

[mdb_talon]

If it was me and my whole tank died and I had no idea why I would clean everything with bleach and replace all filter media. The start with a fresh tank and go through the process of cycling correctly.

 

[Mattyou]

Pour x amount of bleach into the tank while running and let it be for a day. Do this a few times and you should be good after a 100% water change x2 or so. That will run the bleach water through the filters and stuff.

 

[weewane]

So how much bleach should i put in a 40gal tank. What should I do about my bio filter and substrate/decorations? Should I go ahead and scrub down and remove all the bio mass that is built up in the HOB filter? basically start from scratch?

 

[Lepisosteus platyrhincus]

its really cold out. drain the tank and let it sit out side for a few days. This will freeze and hopefully kill everything. Followed buy a really good cleaning with rags and soap.
just my imput